ISALPHA
Section: C Library Functions (3)
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BSD mandoc
NAME
isalpha
- alphabetic character test
SYNOPSIS
Fd #include <ctype.h>
Ft int
Fn isalpha int c
DESCRIPTION
The
Fn isalpha
function tests for any character for which
isupper(3)
or
islower(3)
is true and
for which none of
iscntrl(3),
isdigit(3),
ispunct(3),
or
isspace(3)
is true.
In the
``C''
locale,
Fn isalpha
returns true only for the characters for which
isupper(3)
or
islower(3)
is true.
RETURN VALUES
The
Fn isalpha
macro returns zero if the character tests false and
returns non-zero if the character tests true.
SEE ALSO
isalnum(3),
isascii(3),
isblank(3),
iscntrl(3),
isdigit(3),
isgraph(3),
islower(3),
isprint(3),
ispunct(3),
isspace(3),
isupper(3),
isxdigit(3),
toascii(3),
tolower(3),
toupper(3),
stdio(3),
ascii(7)
STANDARDS
The
Fn isalpha
function conforms to
St -ansiC .
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUES
-
- SEE ALSO
-
- STANDARDS
-
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Time: 15:52:52 GMT, January 15, 2023